Bosch 1070 083 221, Connectivity Manual

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Maintenance and replacement
7–2
1070 073 826-101 (01.10) GB
7.2 Replacing the backlight and display
CAUTION
Danger to the module!
All ESD protection measures must be observed when using the mod-
ule! Prevent electrostatic discharges!
Removal and installation
The display and backlight unit of the CPS21T can be replaced independent
of each other.
To install and remove, the control panel must be removed completely.
1. For reasons of safety, interrupt the power supply to the connected Bosch
IPC300. Remove all connectors from the control panel and from the sup-
ply and distribution circuit board (only CPS21T with keypad). Also re-
move all protective conductor connections to the housing.
2. Loosen the mounting screws on the housing cover. Remove the housing
frame with the display unit from the housing cover.
3. Loosen the front panel from the CPS21T housing frame (refer to the illu-
stration on page 7–2).
4. After loosening the cover retaining screws, you can open the cover of the
sheet metal housing on the rear of the control panel (refer to the illustra-
tion on page 7–2).
5. Remove the ribbon cables from the display connector, and remove the
display housing frame including display and backlight unit in a sideways
direction.
hinged housing cover
Front panel (top view)
CPS21T with keypad,
Housing frame
Housing frame of
the display unit